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Facing issue in making rest api(Get) in nodejs


Facing issue in making rest api(Get) in nodejs

By : Stephen Sheafer
Date : November 20 2020, 03:01 PM
With these it helps Your express route is wrong. You should create the GET route. So, change the following
app.post('/api/admin/interview/getCategories', AdminUtills.getInterviewCategories)
code :


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I am facing problems while making a dragable stacked bar chart in d3 v4. The major issue I am facing is in the translati

I am facing problems while making a dragable stacked bar chart in d3 v4. The major issue I am facing is in the translati


By : Sawaiz
Date : March 29 2020, 07:55 AM
With these it helps You don't need to play around with start_x_old and start_x_new...
Just set a datum to your selections:
code :
var xDrag = svg.selectAll(".serie")
    .datum({x: 0})
    .call(drag);
var xDrag1 = svg.selectAll(".axis--x")
    .datum({x: 0})
    .call(drag);
function dragged(d) {
    xDrag.attr("transform", "translate(" + [(d.x = d3.event.x), 0] + ")");
    xDrag1.attr("transform", "translate(" + [(d.x = d3.event.x), height] + ")");
}
var start_x_old, start_x_new = 0,
  x_diff, xtranslated,
  svg = d3.select("svg"),
  margin = {
    top: 20,
    right: 20,
    bottom: 30,
    left: 40
  },
  width = +svg.attr("width") - margin.left - margin.right,
  height = +svg.attr("height") - margin.top - margin.bottom,
  g = svg.append("g").attr("transform", "translate(" + margin.left + "," + margin.top + ")");
var data = [{
  labelName: "Financial Data",
  no: 27,
  yes: 10
}, {
  labelName: "Production & completion data",
  no: 24,
  yes: 32
}, {
  labelName: "Support Center Data",
  no: 18,
  yes: 21
}];

/*var drag = d3.drag()
                .on('start.interrupt', function () {
                    xDrag.interrupt();
                    xDrag1.interrupt();
                })
                .on('start drag', function () {
                xDrag.attr("transform", "translate(" + (d3.event.x) + "," + 0 +")")
                xDrag1.attr("transform", "translate(" + (d3.event.x) + "," + height +")")
                });*/
var drag = d3.drag()
  .on("start", dragstarted)
  .on("drag", dragged)
  .on("end", dragended)

function dragstarted(d) {
  d3.event.sourceEvent.stopPropagation();
  d3.event.sourceEvent.preventDefault;

}

function dragged(d) {
  //console.log("dragging");
  //x_diff = start_x_old - start_x_new;
  xDrag.attr("transform", "translate(" + [(d.x = d3.event.x), 0] + ")");
  xDrag1.attr("transform", "translate(" + [(d.x = d3.event.x), height] + ")");
}

function dragended(d) {
  xDrag.datum({
    x: d3.event.x
  });
  xDrag1.datum({
    x: d3.event.x
  });
}
data.sort(function(a, b) {
  return (b.yes + b.no) - (a.yes + a.no);
});
var x = d3.scaleBand()
  .rangeRound([0, width])
  .padding(0.1)
  .align(0.1);

var y = d3.scaleLinear()
  .rangeRound([height, 0]);

var z = d3.scaleOrdinal()
  .range(['#42c8c5', '#d05a59']);

var stack = d3.stack();
data.sort(function(a, b) {
  return (b.yes + b.no) - (a.yes + a.no);
});
x.domain(data.map(function(d) {
  return d.labelName;
}));
y.domain([0, d3.max(data, function(d) {
  return (d.yes + d.no);
})]).nice();
z.domain(Object.keys(data[0]).slice(1));
g.selectAll(".serie")
  .data(stack.keys(Object.keys(data[0]).slice(1))(data))
  .enter().append("g")
  .attr("class", "serie")
  .attr("fill", function(d) {
    return z(d.key);
  })
  .selectAll("rect")
  .data(function(d) {
    return d;
  })
  .enter().append("rect")
  .attr("x", function(d) {
    return x(d.data.labelName);
  })
  .attr("y", function(d) {
    return y(d[1]);
  })
  .attr("height", function(d) {
    return y(d[0]) - y(d[1]);
  })
  .attr("width", x.bandwidth());

g.append("g")
  .attr("class", "axis axis--x")
  .attr("transform", "translate(0," + height + ")")
  .call(d3.axisBottom(x))
  .selectAll("text")
  .style("text-anchor", "end")
  .attr("transform", "rotate(-60)");

g.append("g")
  .attr("class", "axis axis--y")
  .call(d3.axisLeft(y).ticks(10, "s"))
  .append("text")
  .attr("x", 2)
  .attr("y", y(y.ticks(10).pop()))
  .attr("dy", "0.35em")
  .attr("text-anchor", "start")
  .attr("fill", "#000");

var xDrag = svg.selectAll(".serie")
  .datum({
    x: 0
  })
  .call(drag);
var xDrag1 = svg.selectAll(".axis--x")
  .datum({
    x: 0
  })
  .call(drag);
.bar {
  fill: steelblue;
}

.axis path {
  display: none;
}
<script src="https://d3js.org/d3.v4.min.js"></script>
<svg width="700" height="500"></svg>
NodeJs facing the issue while using async waterfall

NodeJs facing the issue while using async waterfall


By : dsdel
Date : March 29 2020, 07:55 AM
With these it helps Looks like you forgot to close parentheses here in your second arrow function definition:
code :
(data, nextCall => {
(data, nextCall) => {
Issue while facing editing the products in my Nodejs project

Issue while facing editing the products in my Nodejs project


By : Solfier
Date : March 29 2020, 07:55 AM
around this issue This is why you should indent your code. You forgot to add the curly braces after else so it is,
code :
else
   this.id = Math.random().toString()
const p = path.join(path.dirname(process.mainModule.filename), 'data', 'products.json')
...
else{
    this.id = Math.random().toString()
    const p = path.join(...)
    fs.readFile(p, (err, data) => { 
        ...
        })
    })
}
const product = require(path.join(..., 'product.json'));
Facing issue while fetching latest data's in nodejs

Facing issue while fetching latest data's in nodejs


By : Anton Bogdanovskiy
Date : March 29 2020, 07:55 AM
I wish this helpful for you The code inside the for loop is asynchronous. Therefore, the response is sent with an empty result, before the queries in the for loop are done running.
You should make the code wait for the queries to finish running before sending the response.
code :
router.post('/todayList', (req, res, next) => {
  abc
    .find({ uploadedDate: { $eq: req.body.uploadedDate } })
    .then(product => {
      let final = funct.duplicate(product, 'item_name')
      var promises = []
      final.forEach((err, documents) => {
        promises.push(
          new Promise((resolve, reject) => {
            if (err) return reject(err)
            abc
              .find({ item_name: comp.item_name, uploadedDate: { $eq: req.body.uploadedDate } })
              .sort({ date: -1 })
              .limit(1)
              .exec((err, docs) => {
                if (err) return reject(err)
                resolve(docs)
              })
          })
        )
      })

      Promise.all(promises).then(result => {
        res.status(200).json({
          data: result
        })
      })
    })
    .catch(err => {
      console.log(err)
      res.status(500).json({
        error: err
      })
    })
})
Facing issue for synchronous operation in NodeJS

Facing issue for synchronous operation in NodeJS


By : Bilay Choudhury
Date : March 29 2020, 07:55 AM
help you fix your problem Below code have 2 files and having client.js which calls to server file but didn't get the synchronous output. I tried with promise, bluebird, async_await but didn't get success. Expected output is a sequence of the alphabet in a console. , You can use util.promisify.
Here is sample code
code :
const reqpost = util.promisify(request.post); 

async function loopAsync() {
    var page = 0;
    var last_page = array_data.length;
    while (page < last_page) {
      await reqpost({
        url: 'http://localhost:3000',
        form: 'test=' + array_data[page]
      });
     page++;
 } } 

loopAsync();
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